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I will fix website bugs in react nextjs javascript and nodejs
Muhammad Hamza
About this gig
Is your website or web app showing errors, broken functionality, API problems or deployment issues?
I can debug and fix issues in modern JavaScript applications, including:
- React and Next.js bugs
- JavaScript and TypeScript errors
- Node.js backend issues
- API and integration errors
- Broken forms and components
- Responsive and UI problems
- Authentication issues
- Build and deployment errors
- Vercel configuration issues
- Firebase, Supabase and database-related app issues
I work with existing codebases to identify the actual cause of the problem, apply a clean fix, and test the affected functionality.
My experience includes production business systems, SaaS applications, dashboards, APIs, authentication, databases, Stripe and third-party integrations.
Tech: React, Next.js, Node.js, TypeScript, JavaScript, PostgreSQL, MongoDB, Firebase, Supabase and REST APIs.
For complex or unclear issues, please message me with the error and project details before ordering so I can recommend the correct package.
Respect third-party rights
Please be aware that it is against Fiverr's policies for sellers to include themes, templates, or any other elements that infringe third-party rights or applicable laws in the delivered work. Read more about in our Guide to Responsible Digital Creation.
Get to know Muhammad Hamza
Muhammad Hamza
Full Stack Developer Nextjs, React, Nodejs
- FromPakistan
- Member sinceSep 2025
- Avg. response time1 hour
- Last delivery7 months
Languages
Urdu, Punjabi, English
I’m a Full-Stack Developer specializing in Next.js, React, TypeScript, Node.js, PostgreSQL, MongoDB, and Prisma. I build production web apps, SaaS products, internal business systems, responsive frontends, and API integrations.
My work includes inventory software supporting 100–300 daily orders and 20,000+ incoming units per month, an AI sales-chat SaaS with real-time messaging and Stripe billing, and React websites built from Figma designs.
I focus on clean code, clear communication, reliable delivery, and practical solutions built around your business needs.
My Portfolio
FAQ
What kinds of bugs can you fix?
I can troubleshoot React, Next.js, JavaScript, TypeScript and Node.js issues including frontend errors, API problems, authentication issues, responsive bugs, build failures and deployment errors.
Should I contact you before ordering?
For a small and clearly identified issue, you can order the Basic package directly. For complex, unknown or multiple issues, please message me first so I can confirm the scope.
What counts as one bug?
One bug means one clearly defined technical issue or root cause. Multiple error messages caused by the same underlying problem may still count as one issue, while separate problems may require a larger package.
Can you fix Next.js and Vercel deployment errors?
Yes. I can troubleshoot Next.js build failures, environment configuration, deployment problems and other Vercel-related application issues when they fall within the selected package scope.
Can you work on an existing codebase?
Yes. This Gig is specifically designed for existing websites and web applications.
Can you add new features?
Small changes related directly to a bug may be included. New functionality or larger feature development should be handled through a custom offer or my custom web development Gig.
Will you need access to my source code?
Usually, yes. Depending on the issue, I may need the project files or repository and relevant environment/deployment information. Please never send sensitive production credentials unless they are actually required.
What if you discover that the problem is larger than expected?
I will explain what I find and clearly identify any work that falls outside the purchased scope before additional work is performed.
